Control system.



No. 779,206. PATENTBD JAN. s, 1905-. P. E. CASE. CONTROL SYSTEM.

APPLIGATION FILED SEPT. 24,1903.

4 SHEETS-SHEET '1.

NQ. 779,206. PATENTED JAN. 3, 1905. P. E. CASE.

CONTROL SYSTEM.

APPLIOATION FILED SEPT. 24.1903.

4 SHEETS-SHEET 2.

. E du E n r n d ...Fm Wb M L 1M l .m m n a H @mmm wrm M L. L .mx fm um .Mm n@ Udnu @um @v m\ \-..r Juf. U /m/,n l. /w m PAENTED4 JAN. 3, 1905.

P. E. CASE.

GGNTROL SYSTEM.

APPLICATION FILED SEPT. 24.1903.

4 SHEETS-SHEET 3.

Invenor FRANK ELCASE. WM lA-v-l PATENTED JAN. 3, 1905.

F. E. OASE.

CONTROL SYSTEM.

APPLICATION FILED SEPT. 24.1903.

4 SHEETS--SHEBT 4.

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ITA/@PHS O1? FRANK ECASE;

Amy.

UNITED STATES Patented January 3, 1905.

PATENT OFFICE.

FRANK E. CASE, OF SCHENECTADY, NEW YORK, ASSIGNOR TO GNRAL ELEC'lRlC COMPANY, A CORPORATION OF NEV YORK.

CONTROL SYSTEM.

SPECIFICATION forming part of Letters Patent No. 779,206, dated January 3, 1905.

i Application filed September 24, 1903. Serial No. 174,388.

To t/f wl/tom, t may concern/,f

Be it known that I, FRANK E.' CASE, a citi- Zen of the United States, residing at Schenectady, county of Schenectady, State of New York, have invented certain new and useful improvements in Control Systems, oi' which the 'following is a specification.

My invention relates to systems of control for electrical apparatus, and more particu- IO larly to the control of a plurality of motors mounted on cars which are coupled together to form a train.

In systems oi' motor control in which mo tor-controllers of the separately-actuated contact type are employed it has been suggested to use a control system comprisinga plurality of conductors, either pipes 'for compressed fluid or wires for electric current, to which the actuating means of the motor-controller 2O contacts are connected, the said conductors being so arranged that their connection to a source of power or their energization is under the control or' a master-controller located at any desired point. It has also been suggested to divide each motor-controller into series-parallel-controlling contacts and resistance-varying contacts and to so organize the system that to produce a certain numberoi:l resistance steps either during acceleration in series or 50 in parallel a corresponding number of conductors are employed and that practically the same conductors are used to control the resistance-varying contacts when the motors are connected in series that are used when the motors are connected in parallel.

lt is the object of my invention to simplify the control system through which the operation of the controller-contacts is secured, and I accomplish this result by so organizing the system that it may be utilized for the operation of other controller-contacts or circuitcontrolling devices after the contactsor devices to which it is iirst operatively connected have been actuated. ln the particular type of system illustrated in the present application, in which the controller-contacts are actuated by electromagnets having their actuating-coils connected inI circuit with a plurality of conductors or trainwires leading to a master-controller, an application ot' the improvements constituting my present invention results in reducing' the size ot' the masterscontroller and lessening the number of conductors or train-wires required to operate the controller-contacts to produce a certain number of resistance steps; and in one ot' its aspects my invention consists in applying' to such a system means for disconnecting' a train-conductor from the circuit-controlling device with whichit is iirst connected and connecting it to another circuit-controlling device, so that the second time said conductor is connected to a source oi' power a device separate and distinct from the one operated when the said conductor is first connected to the source oi' power is operated. Vhen two resistance-controlling contacts are operated in this way through a single cond uctor, an additional resistance step during the acceleration of the motors is obtained.

In another of its aspects my invention consists of a controller comprising a plurality of groups or' separately-actuated contacts in combination with a control system therefor constructed and arranged to secure the operation of the contacts of one group and means for operatively connecting said control system to another group of contacts.

More speciiically considered, my invention Vconsists oi' the combination oi' a plurality of SO motor-controllers of the separately-actuated contact type, each controller having a plurality or' groups ot' resistance-varying electromagnetically-actuated contacts, a controllingswitch for connecting the actuating-coils otl the 35 contacts of a certain group in each motorcon Vtroller successively in circuit through certain circuit or circuits through the actuating-coils of the operated contacts of the previous group or groups, so as to maintain said contacts in their operated position during the -time that the contacts in the succeeding group or groups are being operated.

Referring to the accompanying drawings, Figure l represents the equipment on a single car of a train-control system embodying my invention in a simple form. Fig. 2 is a diagrammatic representation of a modification of the system shown in Fig. l. Fig. 3 is a diagrammatic representation of the equipment on a single car of a train-control system, showing a more complex but preferred embodiment of my invention. Fig. 4 is an elevation of the upper part of a master-controller used in connection with the system illustrated in Fig. 3. Fig. 5 is a sectional elevation of the preferred form of electromagnetically-actuated relay used in connection with the system shown in Fig. 3. Fig. 6 is a front view of said relay. Fig. 7 is a sectional elevation of the relay, showing the relay-contacts in adifferent position from that shown in Fig. 5; and Fig. 8 illustrates diagrammatically a train of three cars equipped with my invention.

Referring now to Fig. l, C represents a motor-controller of the separately-actuated contact type which is adapted to control the motors M and M2. The contacts of said controller which control the series connection of the motors are indicated by T, T, R, and S. The contacts which control the parallel connections of the motors are indicated by T, T', R2, l), and P. The resistance-varying contacts are indicated by R3, R", R5, R, RS, and RS. The sections of resistance which are connected in the motor-circuit are indicated by l" to r, inclusive, and the resistance-sections which are connected in the control-circuit to compensate for the resistance of the actuating-coils of the motor-controller contacts when the latter are cutout of circuit are indicated by R", R", and Re. The resistance-varying contacts are adapted to be operated during acceleration in series and during acceleration in parallel by the energization of certain of the conductor or train wires l to 6, inclusive, as determined by the master-controllers C. One of said mastercontrollers C is shown in development, as is customary in illustrating such a structure. The lixed contact-lingers of the master-controller C are indicated by c to ai, inclusive, While the contact-segments carried by the movable member of said master-controller are indicated by Z1 to inclusive, c3, c7, cs, c, fl, ds, and es. The preferred relative location of the motor-controllers C, and master-controllers C on the several motor-cars of a train is clearly shown in Fig. 8. Attached to the movable member of the contact R5 are auxiliary switches /L and L". These auxiliary switches may be attached to other of the resistancevarying contacts, provided the proper connections are made to produce the desired results. In the system shown in this ligure the auxiliary switches allow the use of the train-wires et and 5 twice during acceleration in series and of the train-wire4 twice during acceleration in parallel-that is to say, the auxiliary switch /i allows the contact R and the contact I to be operated separately by successive energizations of the train-wire 4L. Also the auxiliary switch /L allows the use of the train-wire 5 twice during acceleration in series to operate the contacts R" when lirst energized and the contacts Rs when energized a second time.

The auxiliary switches and 1;', attached to the motor-controller contacts Pand S, respectively, prevent the simultaneous completion of the series-control circuit and the parallelcontrol circuit in a manner well understood in the art. When P is closed, the switch 71; opens the control-circuit in which the actuating-coil of the contact S is located, and the switch opens the control-circuit in which the actuating-coils of the contacts l) are located when the contact S is closed.

An overload or current-measuring coil 12, located in the motor-circuit, is adapted to operate the movable contact member 12" of the overload-relay l2 when a predetermined abnormal current liows through the motor-circuit. This movable member closes a shuntcircuit about the lield of the motor M, and thereby operates an indicating device l5, connected in said shunt-circuit, to indicate to the motorman that an excessive current is flowing through the motor-circuit. The indicating devices l5 are located adjacent to each master-controller and are provided with cutout switches 16.

ln the operation of the system shown in Fig. l the movement of the master-controller through its lirst six operative positions causes the motors M and M to be connected in series and the resistance-varying contacts to be operated successively to reduce the resistance of the motor-circuit. The controlcircuit corresponding to the lirst operative position of the master-controller is as follows: starting from the trolley T, through the trolley-conductor T, contact-linger a', contact-segments and b2, contact-linger a, train-wire l, actuating-coils of the contacts T" R S, contacts of the auxiliary switch train-wire 2, contact-linger ci, contact-segments i and contact-linger at to ground at (i2. This energizes the series-controlling contacts of the motor-controller and causes a circuit to be comgleted through the motors, as follows: from tro'lley or collector shoe T, conductor 7, contacts T and T in parallel, conductor or frame 8, contact R', resistancesection f1", motor M, conductor 9, contact S7 conductor or frame l0, conductor ll, motor M2, actuating-coil l2 of the overload-relay l2 IOO to ground at G. In the second position of the ment of the master-controller into its thirdposition causes the energization of the trainwire 5, the circuit from said train-wire 5 being readily traced, as follows: through conductor 23, movable member 25 of the auxiliary switch L, contact 26, resistance Re, actuatingcoils of the contacts RAl and R3 to ground at Gr, thereby operating the contact R'1 to conneet the resistance-section fr" in the motorcircuit, while at the same time maintaining' the contact R3 in its closed position. In the fourth position of the master-controller the train-wire 6 is energized, thereby causing the actuating-coil of the contact Rl to be connected in series with the actuating-coils of the contacts R'j and R3. rlhe operation of the contact R5 causes the moyable members 24; and 25v of the auxiliary switches /t and 7L', rcspectively, to be moved away from the contacts 28 and 26, respectively, into engagement with the contacts 29 and 27, respectively. Therefore when the master-controller is moved into its fifth position and the train-wire #t is energized a second time a control-circuit will be completed through said train-wire 4, thence through the conductor 22, movable member 24 of the auxiliary switch t, contact 2), conductor 30, actuating-coils of the contacts R, R5, R", and R3 to ground at Gr. ln the sixth operative position or iiual series position of the master-controller the train-wire 5 is again energized, thus completing a control-circuit through said. train-wire and the conductor 23, movable member 25 of the auxiliary switch L, contact 27, conductor 31, actuating-coils of all of the resistance-varying contacts in series to ground at Gr', thereby short-circuiting the sections of resistance in the motor-circuit. The control-circuits that are completed during acceleration in parallel may readily be traced, and it is not necessary to follow said circuits out in detail.

Whenever the current whichflows through the motor-circuit reaches a predetermined abnormal amount, the actuating-coil l2 of the overload-relay 12 will be energized suiiiciently to attract the movable member 12" of said relay into engagement with the contacts 19, so as to complete a circuit in shunt to the fieldg coil of the motor M2, through conductors 13 and la, indicating device 15, closed cut-out switch 16, conductors 17 and 18, contacts 12" and 19 to ground at G', thereby operating said indicating device 15 to serve as a warning to the motorman that the predetermined maximum current has been exceeded.

ln the modilied form of the invention shown in Fig. 2 the parts of the system correspondingl to those shown in Fig. 1 are designated by similar reference characters. In this modilication the contact-lingers of the master-controller are designated by a' to am, inclusive, the contact-segments carried by the movable member of said controller are designated by to bw, inclusive, c, c7, c, and 01, andthe trainwires are designated by 1 to 7, inclusive. ln this modilication the auxiliary switches, which are used for the purpose of reducing the number of conductors or trainwires required to produce a certain number of resistance steps during acceleration of the motors, are attached to the motor-controller contacts Rl and R2 instead of being attached to the contactRi. These auxiliary switches (indicated by /1/2 and 7b3, respectively) allow the use of the trainwires et to actuate the contact R:i during acceleration in series and the contact 1 i during acceleration in parallel, thereby producing a different combination of resistance-varying contacts in parallel from that obtained bythe energization of the same train-wire during ac celeration in series. This reduces the number of conductors or train-Wires required to produce a certain number of resistance steps during acceleration of the motors. It is customary in the systems now in use to so proportion thc resistance-sections that to produce a uniform acceleration the contacts R and R" are operated independently and the contacts R, R", and R' are operated substantially together during acceleration in series, while during acceleration in parallel the contacts R: and R41 are operated together and the contact R" is operated independently of the contacts RH and R". It has heretofore been found necessary to provide an additional train-wire and connect the same between the actuating-coils of the contacts R and R to obtain the same number of resistance steps throughout the acceleration of the motors which 1 now obtain without said additional train-wire. Amore detailed description of the control system over which my present invention is intended as an improvement may No. be had by referring to the patent to Perry, 687,060, granted November 19, 1901. In the operation of this modified system when the master-controllor (Y is moved into its iirst operative position the series-controlling contacts of the motor-controller C are operated to connect the motors in series, as before described with reference to Fig. 1. ln the second operative position of said master-controller the tram-wire 4 1s energized anda control- IOO IOS

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circuit is completed through said train-wire 4 and conductor 34, auxiliary switch fifi, which has been closed by the operation ot the contact R, thence through conductor 35, resistance R, actuating-coil ot contact R3 to ground at G. In the third and fourth positions ot' the master-controller the contacts Rl and R are operated successively to reduce the resistance ot' the motor-circuit. In the ii'tth or iinal series position the contacts R, RS, and Rs are simultaneously operated. In the transition position between series and parallel the control-circuits are all opened. In the [irst parallel position of the master-controller the contacts T, T, R, I), and .P are energized and the closing of the contact R72 also causes the closing of the auxiliary switch t. I/V hen the master-controller is moved into its second parallel position, or seventh operative position, the train-wire 5 is energized to cause the contacts R'I and .It to be operated together. The next operative position cuts in the contact R5, thereby further reducing' the resistance ot the motor-circuit. In the ninth operative position of the master'- controller the train-wire a is energized, and since the switch 7i is closed a circuit is completed through said train-wire et and the conductor 34, contacts ot' the auxiliary switch t, conductor 36, actuating-coils of the contacts R, R'r, R", and R:l in series to ground at thereby producing a resistance step which is not produced during acceleration in series. In the next and linal operative position ot' the master-controller the contacts R' and RS are operated together to short-circuit the resistance ot' the motor-circuit.

In the system shown in Fig. 3 the motors, as before, are indicated by M/ and M2, the motor-controller by C, the master-controller by U, the trolley or collector shoeby T. and the trolley conductor by T. The contacts ot' the motorcontroller which control the series connection ot the motors are T T and S, while the contacts which control the parallel connections ot' the motors are T/ T. I), and P. The train-wires are .indicated by l to S, inclusive. The resistance-sections which are connected in the control-circuits to compensate for the resistance ot' the actuating-coils ot the motor-controller contacts when the latter are cut out ot' circuit are represented by I RCR The resistance which is cut out step by step in the motor-circuit during the acceleration of the motors in both series and parallel relationship is indicated by R. The contacts ot' the motor-controller which control the sections of said resistance are indicated by R' to Ru, inclusive, the said contacts being divided into groups, each group containingl a predetermined number ot' contacts. The mastercontroller in this modilied system includes two controlling-switches A and B and a separate series-parallel switch I), employed vfor the purpose ot' controlling the operation ot' the series-parallel contacts Tl T', S, I), and P. The switches A and B are preferably mechanically connected together, so that the movable member o't' the switch A will be moved to complete a number ol rotations and malte the same con/ibinations a number ot' times while the movable member ot' the switch B is passing through its Vl'ull range ot movement, which is a fractional part of one rotation. The contact-segments carried by the cylinder ot' the switch A, which in the system illustrated is geared to the cylinder ot the switch B so as to malte three com plete rotations while said cylinder B is movingapproximately two hundred and seventy degrees, are indicated by (ZU to (ZU, inclusive, while the contact-lingers which engage said contact-seg'- ments are designated by c to c, inclusive. The contact-segments ot the switch B are designated by to b, inclusive, and the contactlingers which engage with said contact-segments, respectively, are designated by a to au, inclusive. The movable member of the series-parallel switch l) is designated by eti). The contact-lingers ot said sericsparallel switch which correspond to the series position ot' the motor-controller are designated by 5() and those corresponding to the parallel position ot the motor-controller are designated by 51. The contact-segments oll the operatings`witch A energize certain train-wires successively and cause the contacts ol a certain group ot' resistance-controllingl contacts ot the motor-controller to be operated successively. dien all the contacts ot' said group which are controlled by said switch are operated, the switch B is moved into its lirst operative position, thus causing' the last contact of said group to be operated and also causing' the maintaining-circuit to be completed through the actuating-coils ol said contacts, whereby the contacts which have already been operated by the switch A are maintained in their closed position. The controlling-switch A is theretore ready to repeat the successive energization ot' the same train-wires above referred to and cause the contacts .in another group to be operated successively. Immediately after said maintaining-circuitis completed the trainwires above referred to are disconnected from the actuating-coils olE the contacts ol said group and are connected to the actuatingcoils ot' the correspond ing contacts ol the next adjacent group by means ol the relay 11). Each of the electroniag'neticall\'-actuated relays IC and E is made up ol the solenoid 38 and the core 3, the latter being operatively connected to the movable members 3%', 4i), and stt, adapted to engage, respectiwly, with the contacts 4t2, 3, and Liet when in one position and with the contacts A5, JLG, and 4T when in another position. The said movable members are maintained normally in engagement with the contacts 4t2, 3, and LH, respectively,

by means ot' the springS and are moved into lOO engagement with the contacts 45, 46, and 47 against the action of said spring when the solenoid 38 is energized.

In Figs. 5, 6, and 7 I have shown the preferred form of the relay E. The actuatingcoil 38 of said relay is mounted upon aframe 65, which may be bolted or otherwise fastened to the under side of the car-floor or in any other desired location. The core 38 of said solenoid is pivotally connected at 67 with the lever 68, pivoted at 69 in the frame 65. Said lever 68 carries at its outer end a plurality of movable switch contact members 39, 40, and 41, which are adapted when in the denergized position of the relay to engage with the relatively fixed spring-mounted contacts 42, 43, and 44. This position of the relay is shown in Fig. 5. In the other operative position of said relay-- that is, in the position assumed by said relay when the solenoid 38 is energized, as shown in Fig. 7 the movable contacts 39, 40, and 4l are in engagement with the spring-mounted contacts 45, 46, and'47. The strips 70 of insulatingl material are placed in the frame 65 between the contacts 42, 43, and 44 to protect said contacts from' injury and also to form blow-out chutes for the arcs which tend to form at said contacts. The said insulating-pieces are supported in the frame 65 between the block 7l of insulating material carried at the outer end of the brackets 72 and the block 73, upon which the contacts 42, 43, and 44 are mounted. The contacts 45, 46, and 47 are mounted on the block 71. To avoid the use of rigidly-fastened flexible leads between the movable members 39, 40, and 41 and the iixed support, the spring-mounted contact-lingers 74 are fastened at one end to the block 7l and engage the lower ends of said movable contact members. The hook-shaped pieces 75, carried by the block 7l, are for the purpose of supporting the cables or conductors which lead to and from said relays. The spring 48 tends to maintain the movable parts of the relay in the position shown in Fig. 5, the said movable parts being' operated against the action of said spring by the electromagnetic attraction of the solenoid 38. Any desired number of contactfingers or movable contact members may be carried by the lever 68.

Referring now to Fig. 4 of the drawings, I have indicated one form of amaster-controller which may be used to perform the functions of the controller illustrated diagrammaticall y in Fig. 3. In this Fig. 4, A indicates the cylinder of the operating-switch of the mastercontroller, and B indicates the cylinder of the maintaining-switch of said controller, the said cylinders being geared to each other by means of the gearing G in such amanner that the cylinder A will rotate approximately four times as fast as the cylinder B. The handle H is provided for the purpose of operating both of the cylinders A and B. The reversing-switch in this controller is indicated by RS. The

series-parallel switch D is operated by the handle D; but, if desired, it may be connected to the operating-handle of the mastercontroller, so as to be operated from said handle in a manner such as is shown and described in the application of C. E. Barry, Serial No. 174,386, filed concurrently herewith.

In the operation of the system illustrated in Fig. 3 when the master-controller is moved into its first operative position either series or parallel relationship of the motors can be obtained, depending upon theposition of the series-parallel switch D. Let us suppose that this series-parallel switch has been thrown into its series position with the movable member of said switch in engagement with the contact-fingers 50. Then the control-circuit corresponding to the first position of the master-controller may be traced as follows: from the trolley or collector shoe T, trolley conductor T2, contact-finger c, contact-segments and '012, contact-lingers (i12 and c, train-wire 8, conductor 52, actuating-coils of the contacts T T/ and S, auxiliary switch 1, conductor 54, train-wire 2, conductor 55, contacts 50 and 49 of the series-parallel switch D, conductor 56, contact-finger al, contact-segments bw and Z217, contact-linger au, to ground at G. The completion of said circuit causes the energization of the contacts T T/ and S. A control-circuit is also completed from the contact-finger@12 of the switch B,through conductor 57, contact-finger cu of the switch A, contact-segments (Zu and Z12,contact-iingcr c, train-wire 5, resistance Bd, member 41 of the electromagnetically-actuated relay E, contact 42, actuating-coil of themotor-controller contact R', to ground at Gr. The motors are thus connected in series with each other and with the entire resistance B. In the second operative position of the master-controller the circuits completed by the hold-up switch B are unchanged while the contact am of the switch A is brought into engagement with the linger el, thereby completing a circuit through the train-wire 4, resistance Re, member 4() of the relay E, contact 43, actuating-coils of the motor-controller, contacts Rfz and Bf, to ground at G. The third position of the master-controller causes the train-wire 3 to be energized and completes a circuit through the resistance Rf, member 39 of the relay E, contact 44, actuating-coils of the contacts It, R2, and R to ground at G'. The movement of the master-controller into its next operative position causes the contact-segments of the switch A to move out of engagement with its contact-lingers and causes the maintainingswitch B to assume its second operative position. In this position of the switch B a maintaining-circuit is completed from the contactfinger cl2, through the contact-finger al, thence through the contact-segments Zim and L, contact-linger c, train-wire 7, solenoid 38 of the relay E, actuating-coils of the contacts R, It,

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R2, and R in series, to ground at G'. The completion ofl this maintaining-circuit causes the said switch B to hold up the first group of motor-controller contacts already operated by the switch A, while at the same time, due to the energization ofl the coil 38, it causes the relayE to break the connections between the train-wires which were previously energized by the switch A and the actuating-coils of' the first group of contacts and then conneet said train-wires to the actuating-coils of' the contacts R5, R, and R7 of the second group of' resistance-controlling contacts ofl the motorcontroller C through the movable members of the relay E. It will thus be seen that as the master-controller is moved into its next operative position-that is, the first position of the switehA corresponding to the second position of' the switch B-a circuit will be completed from thecontact-finger am, through conductor 57, contact-finger cu, contact-segments Zu and (Z 1Icontact-finger cl2, train-wire 5, rcsistance Rd, movable member Ll of the relay E, contact 45 of said relay, conductor 60, movable member 4l of the relay E, contact 4t2 of said relay, actuating-coil ofl the resistancecontrolling contact R5, to ground at G. A further forward movement of the master-controller brings the contact-segments (Zw and CZ successivelyinto engagement with the contact-fingers cw and c, thereby energizing the train-wires 4 and 3 successively, so as to cause the operation ofl the contacts R and R7 successively. As the master-controller moves into its neXt operative position the contactsegments of' the switch A are moved out of' engagement with the contact-fingers o1.l said Switch and the switch B assumes its third operative position, thereby energizing the trainwire 6 by bringing the contact-segment Il into engagement with the contact-finger am. By the energization of said train-wire 6 a maintaining-circuit is completed through the solenoid 38 ofthe relay E, through the actuating-coils of the resistance-controllin g contacts RR R7 R R5 in series, to ground at (i2. The completion of' this circuit causes the energization of' the solenoid 38 of' the relay E, thereby throwing the movable member, ofl said relay against the action of' the spring 48 into engagement with the contacts 45, A6, and 47, respectivel y, so that when the movable member ofl the switch A is again moved through its operative positions the resistance-eontrolling contacts R, Rw, and R1l will be successively operated.

The same number of resistance-steps as above described may also be obtained throughout the acceleration of the motors when connected in parallel, it being necessary only to move the series-parallel switch D into the position corresponding tothe parallel position of' the motor-controller-that is to say, to move the movable contact A9 of said switch D into engagement with the contact-fingers 51.

Thus a circuit corresponding to the first parallel position ofl the master-controller may be traced as follows: from the trolley or collector shoe T, through the trolley conductor T2, contact-finger a, contact-segments L11 and Il, contact-linger ai, contact-finger am and trainwire 8, conductor 52, actuating-coils of' the contacts T T', conductor 53, actuating-coils of' the contacts P and P, auxiliary switch 7:', conductor 6?), train-wire 1, conductor 64, contactfingers 51 and movable contact member 49 ol the series-parallel switch, conductor 56, contact-lingers al of' the switch B, contact-segments 01 and 7217, contact-finger (tu, to ground at G. The circuits through the motors correspondingl to the above-indicated positions of' the master-controller may readily be traced on the figure.

Although I have shown and described my invention as embodied in an electrically-operated train-control system, it is clear that the power employed need not be electric, but may, if` desired, be compressed fluid or other similar power, it being merely necessary to substitute suitable conductors and actuating and controlling devices applicable to the power employed for the electrical control system comprising the conductors or train-wires and devices applicable to the electrical current as herein shown and described. It is also clear that the devices to be operated need not all be parts ofl the motor-controller, but that one or more of' the train conductors may be used to secure the operation of' any of' the auxiliary devices that are required in a motor-control system either be'f'ore or after said conductor or conductors are used to secure the operation of the contact or contacts of the motor-controller corresponding thereto. Also it will be seen that in the preferred embodiment of' my invention certain ot' the conductors or train-wires may be used over and over again to operate additional resistance-controlling contacts, it being necessary only to provide a relay and an additional conductor for each additional group or division of' the controller-contacts and to construct the mastercontroller so as to take care ofl said additional conductoror conductors. It will also be understood that any number of' conductors may be selected to be used over and over again, provided the master-controller and relays are constructed with controlling devices corresponding in number to the desired number of' contacts in a group or division of' the motorcontroller.

ln the appended claims I aim to cover all modiiications of' the arrangements described herein which do not involve a departure 'from the spirit and scope ol" my invention.

That I claim as new, and desire to secure by Letters vPatent of the United States, is-

1. 1n combination, aeontroller of the separately-actuated contact type, a plurality of conductors operatively connected to the cir- IOO IIO

cuit-controlling devidses of said controller, and means for disconnecting a conductor from the circuit-controlling` device with which it is lirst connected and then connecting it to another circuit-controlling device so that the second time said conductor is connected to a source of power a device separate and distinct from that operated when the conductor is first connected to the source of power is operated.

` 2. In combination, a controller ot' the separately-actuated contact type, a master-controller, a plurality of conductors connected with said master-controller and adapted to be connected with the circuit-controlling devices of said controller, and means independent of said master-controller for disconnecting a conductor from the circuit-controlling device with which it is first connected and then connecting` it to another device so that the second time said conductor is connected to a source of power through said master-controller it will cause the operation of a device separate and distinct from that operated when the conductor is first connected to the source of power. y

3. In combination, a controller ot' the separate electromagnetically actuated contact type, a master-controller, a plurality ol conductors connected with said master-controller and adapted to be connected to the actuatingcoils of the contacts of said controller, and means independent of said master-controller for disconnecting a conductor from the actuating-coil of the contact with which it is lirst connected and then connecting' it to the actuating-coil of another contact so that the second energization of said conductor by a movement of said master-controller will cause the operation of a contact separate and distinct 'from that operated when the conductor is lirst energized.

4. In combination, acontroller of the separateI electromagnetically actuated contact type, a master-controller, a plurality of conductors connected with said master-controller and adapted to be connected to the actuatingcoils of the contacts of said controller', and an auxiliary switch or switches lor connecting` one or more of said conductors with the actuating coil or coils of certain of the controllercontacts when in one position and for connecting the actuating coil or coils ot' certain other contacts to said conductor or conductors when in another position. y

5. In combination, amotor-controller of the separate electromagnetically-actuated contact type, a master-controller, a plurality of con- 2 ductors connected with said master-controller and adapted to be connected to the actuating'- coils of the contacts of said motor-controller,l and an auxiliary switch or switches independent ot' said master-controller and operatively connected with a motor-controller contact or i contacts 'for connecting the actuating coil or l coils of certain other contacts to said conductors.

6. In combination, a motor-controller of the separately-actuated contact type, a mastercentroller, a plurality ol conductors connected to certain of the contact-actuating means of said motor-controller and to said master-controller, and means `for changing certain ol the connections between said conductors and said contacts, whereby one or more of said cond uctors may be energized a second time by a movement of the master-controller during acceleration of the motors in series or during acceleration in parallel to operate different contacts and produce a greater' number of resistance steps in series or in parallel than the number of conductors employed.

7. In combination, a controller comprising a plurality of separately-actuated contacts, a plurality of conductors normally connected to certain of the actuating means of said contacts, and means for disconnecting' one or more of said conductors from the contact-actuating means with which they are normally connected and for connecting them to other ycontact-actuating means so that when each conductor the connection ol which has been so changed is energized, a separate and independent contact is operated.

8. In a motor-control system, a plurality of motors, a resistance, a motor-controller having a plurality of separately-actuated contacts for varying the amount of said resistance connected in circuit with the motors so as to produce a certain number of steps during acceleration in series or during acceleration in parallel, a plurality of conductors less in number than the number of resistance steps desired to be produced in series or in parallel, said conductors being so connected that when they are lirst energized certain contacts will be operated, and means for changing the connections between the conductors and the actuating' means of the contacts ot said motor-controller so that as said conductors are energized a second time certain other contacts will be operated.

9. In a motor-controlsystem` aplurality of motors, a resistance, a motor-controller having a plurality oi separately-actuated contacts 'for varying the amount of said resistance connected in circuit with the motors so as to produce a certain number of steps during` acceleration in series or during acceleration in parallel, a plurality of conductorsless in number than the number of resistance steps desired to be produced in series or in parallel, said conductors being so connected that when they are first energized certain contacts will be operated, means ior changing the connections between the conductors and the actuating means of the contacts of said motor-controller so that as said conductors are energized a second time certain other .contacts will be op- IOO IIO

erated, and means Ylor holding' in their opel'- ated position the contacts which were operated when the conductors were lirst cnerg'ized.

10. 1n a system of motor control, a motor or motors, a motor-controller of the separatelyactuated contact type including' a plurality ot resistance-varyingl contacts, a plm'ality of conductors, a master-controller for connecting' one of said conductors to a source of current- `supply a number of times during the .acceleration of the motors, and means t'or connecting' said conductor to the actuating' means of certain of the resistance-varying contacts so as to produce a certain combination of said contacts when the conductor is iirst energized and 'for changing' said connections so that a different combination ot' the contacts will be produced when the conductor is energ'ized a second time.

11. In a system of motor control, a plurality ot' motors, a motor-controller ot' the separately-actuated contact type including' a plurality ot' resistance-varying contacts, a plurality o1 conductors, a master-controller for connecting' one of said conductors to a source of current-supply a number ot times dm'ing' the acceleration of the motors, and auxiliary switches operatively connected to one or more of said contacts for connecting' one ot' said conductors to the actuating' means of one or more of said contacts and then breaking said connection and connecting' said conductor to the actuating means ot' another contact or contacts so that the successive energ'izations of said conductor will produce diiierent combinations of contacts and consequently ditt'erent resistance steps during' the acceleration o'l the motors.

1Q. vln a motor-control system, a plurality ot' motors,a motor-controller of the separatelyactuated Contact type, amaster-controller for said motor-controller adapted to control theV successive energizations ot' the contacts oi said motor-controller to produce a certain number ot' resistance steps during' the acceleration in series and in parallel, and means whereby the second energization ot| one ot' the conductors leading' from the master to the motor controller during' the acceleration ot' the motors causes a dilierent combination ot the resistance-contacts from that obtained when the conductor is lirst energ'ized whereby a g'reater number ot resistance stops is obtained than that corresponding to the number of conductors employed.

13. 1n combination, a controller comprising a plurality of separately-actuated contacts, means 'for actuating' said contacts, a mastercontroller, a system of conductors leading' therefrom to certain of the actuating' means oi said controller-contacts, and means t'or disconnecting'the atoresaid actuating' means from said system o't' conductors and connecting' others in place thereof.

. 1st. A control system for the separately-actuated contacts of a controller, comprising' a. master-controller, conductors leading' therefrom to the actuating' means o'l certain ot' the controller-contacts, means 'lor maintaining' the contacts after they have been actuated, and means for connecting' said conductors to the actuating' means ot' other of the controllercontacts.

15. ln combination, a controller con'iprising a plurality o1 separately-actuated contacts, a master-controller, a control system operatively connecting' the said master-controller with one or more of said contacts, and means whereby the said control system may be utilized for the operation of other controller-contacts.

16. .ln combination, a controller comprising a plurality ot separately-actuated contacts, a master-controller, a control system operatively connecting' said master-controller with one or more of said contacts, and means vtor operatively connecting' the said control system to other contacts a't'ter the lirst-mcntioned contacts have been operated.

17. A control system for the separately-actuated contacts of a controller, comprising' conductors connected to the operating' means of certain o't' the controller-contacts, means for maintaining' the said contacts after they have been operated, means for connecting' said cond uetors to the operating' means ol other ol" the controller-contacts, and a master-controller for controlling' the operation ol the abovespecilied means.

18. In combination, a controller comprising' a plurality ot' g'roups olf separately-actuated contacts, a control system constructed and arrang'ed to secure the operation ot' the contacts of one g'roup, and means lor operatively connecting' said control system to another g'roup olf contacts.

`19. 1n combination, a controllercomprising' a plurality ot' groups ol se])arately-actnated contacts, a control system constructed and arrang'ed to secure the operatifm ol the contacts et' one group, and means arranged to be operated with the last contact of the first group for operatively connecting' said control system to another group ot contacts.

20. l n combination, a controllerconnvn'ising' a plurality o'tl groups ot' separately-actuated contacts, actuating-coils lor said contacts, a master-controller, conductors leading' therefrom to the actuating-coils ot' the contacts ot the iirst O'rou i, and means lor shifting' the connections ol" one or more ot said conductors to the actuating-coils ol the contacts ot another group.

21.' .l n combination, a controller comprising a plurality ot' groups ot' separately-actuated contacts, a control system operatively conl nected to the contacts ot' the 1i rst group, means l for maintaining' the contacts of the lirst group IO J IlO

after they have been actuated, and means for operatively connecting said control system to the contacts of another' group.

22. In combination, a controller comprising' a plurality of separately-actuated contacts, actuating-coils for said contacts, a system of conductors connected to certain of the actuating-coils, means for disconnecting the aforesaidactuating-coils from said system of conductors and connecting others in place thereof, and a master-controller constructed and arranged to first supply current to the system of conductors to energize the actuating-coils Anormally connected thereto, then to operate the connecting and disconnecting means and finally to ag'ain supply current to said system of conductors to energize the other actuatingcoils.

'23. In combination, a controller comprising a plurality of groups or' separately-actuated contacts, actuating-coils for said contacts, a system of conductors through which current is supplied to the several actuating-coils, electromagnetically-actuated means for shifting' the connections of certain ot' said conductors from the actuating-coils of one group to the actuating-coils of another group of contacts, and a master-controller having its contacts arranged to supply current through the system of conductors to actuate the contacts of the lirst group, then to complete a maintainingcircuit for said contacts when actuated and then to shift the connection of certain or' the conductors or' the said system of conductors to other actuating-coils so that by a further movement of the master-controller the contacts of another group may be operated.

24. In combination, a controller of the separately-actuated contact type, a master-controller for said controller, means for connectingsaid master-controller to certain of the contact-actuating means of said controller for breaking said connections and for connecting other contact-actuating means to said mastercontroller, and means for connecting' said master-controller so as to maintain in their operated position the contacts already operated.

25. In combination, a controller of the separately-actuated contact type, an operatingswitch for connecting the actuating-coils of certain of the controller-contacts to a source of current-supply, means for maintaining said contacts in their operated position when operated by said operating-switch, and means for connecting said operating-switch to the actuating-coils of other of said contacts.

26. In combination, acontroller of the separately-actuated contact type, an operatingswitch for connecting the actuating-coils of certain of the controller-contacts to a source of current-supply, means for completing' a maintaining-circuit through the actuatingcoils of the contacts actuated by said operating-switch, and means operated directly after the maintaining-circuit is completed for connecting said operating-switch to the actuatingcoils of other of said contacts.

Q7. In combination, a controller ol the separately-actuated contact type, an operating'- switch for connecting the actuating-coils of certain otl the motor-controller contacts to a source of cu rrent-su ppl y, a maintaining-switch Jfor completing a maintaining-circuit through said actuating-coils, and an electromagnetically-actuated relay for connecting' said operating-switch to the actuating-coils of other of said contacts, the actuating-coil or' said relay being connected in the maintaining-circuit.

28. In a train-control system, a plurality of controllers each having a plurality of separately-actuated contacts, a master-controller, a control system connecting' said master-controller with correspondingcontacts in the several controllers, and means whereb57 the said control system i'nay be utilized Jfor the operation otl other corresponding' contacts in the several controllers.

29. In a train-control system, a plurality ot' controllers each comprising a plurality oli' groups of separately-actuated contacts, a control system constructed and arranged to secure the simultaneous operation of corresponding contacts in corresponding groups of controller-con tacts, and means for operatively connecting' said control system to secure the simultaneous operation of corresponding' contacts in other corresponding groups in said controllers.

30. In a train-control system, a plurality of controllers or' the separately-actuated contact type, a plurality of train-conductors,a mastercontroller connected with said train-conductors, and means for connecting'said train-conductors to certain of the contact actuating' means ot' each controller, 'for breaking said connections and for again connecting said train conductors to other contact actuating' means or' each controller.

3l. In atrain-control system, aplurality ot' controllers or' the separately-actuated contact type, a plurality of train-conductors,a mastercontroller connected with certain of said trainconductors, and means for connectingl said certain train-conductors to certain of the contact-actuating means of each controller, for breaking said connections and for again connecting' said train conductors to other contact-actuating means of each controller, said master-controller being' constructed and arranged to maintain in their operated position through the remaining' train conductor or conductors the contacts already operated after their actuating' means have been disconnected from the first-mentioned train-conductors.

32. In a train-control system, a plurality of train-Wires, a plurality of motor -controllers ot' the separately-actuated contact type, each controller having' a plurality of groups of resistance-varyingelectroniagnetically-actuated contacts, a controlling-switch for connecting IOO the actuating-coils of the contacts of a certain group in each of said motor controllers successively in circuit through certain of said train-wires, and lan electromagnetically-actuated relay for each motor-controller for connecting the same train-wires which were previously used to operate the contacts of said group to the actuating-coils of the contacts of the next group so that the contacts of the latter group will be operated successively when said controlling-switch is moved through its operative positions a second time.

33. In a train-control system, a plurality of train-wires, a plurality of motor-controllers of the separately-actuated contact type, each controller having a plurality of groups of resistance varying electromagnetically -actuated contacts, a controlling-switch for con necting the actuating-coils of the contacts of a certain group in each of said motor controllers successively in circuit through certain of said train-Wires, an electromagneticallymazos actuated relay for each motor-controller for connecting the same train-wires which were previously used to operate the contacts of said group to the actuating-coils of the contacts of the next group so that the contacts of the latter group will be operated successively when said controlling-switch is moved through its operative positions a second time, and means for completing a maintaining circuit or circuits through the actuating-coils ol the operated contacts of the previous group so as to maintain said contacts in their operated position during the time that the contacts in the succeeding group or groups are being operated.

In witness Whereoil I have hereunto set my hand this 22d day of September, 1903.

FRANK E. CASE.

Witnesses:

Gg. C. HoLLis'ruR, HELEN Ourol-LD. 

